Include mesa-6.4.2 project

1 files changed, 451 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa_6.4.2/progs/util/readtex.c b/nx-X11/extras/Mesa_6.4.2/progs/util/readtex.c
new file mode 100644
index 000000000..280d6c811
--- /dev/null
+++ b/nx-X11/extras/Mesa_6.4.2/progs/util/readtex.c
@@ -0,0 +1,451 @@
+/* readtex.c */
+
+/*
+ * Read an SGI .rgb image file and generate a mipmap texture set.
+ * Much of this code was borrowed from SGI's tk OpenGL toolkit.
+ */
+
+
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <stdio.h>
+#include <stdlib.h> 
+#include <string.h>
+#include "readtex.h"
+
+
+#ifndef SEEK_SET
+#  define SEEK_SET 0
+#endif
+
+
+/*
+** RGB Image Structure
+*/
+
+typedef struct _TK_RGBImageRec {
+   GLint sizeX, sizeY;
+   GLint components;
+   unsigned char *data;
+} TK_RGBImageRec;
+
+
+
+/******************************************************************************/
+
+typedef struct _rawImageRec {
+    unsigned short imagic;
+    unsigned short type;
+    unsigned short dim;
+    unsigned short sizeX, sizeY, sizeZ;
+    unsigned long min, max;
+    unsigned long wasteBytes;
+    char name[80];
+    unsigned long colorMap;
+    FILE *file;
+    unsigned char *tmp, *tmpR, *tmpG, *tmpB, *tmpA;
+    unsigned long rleEnd;
+    GLuint *rowStart;
+    GLint *rowSize;
+} rawImageRec;
+
+/******************************************************************************/
+
+static void ConvertShort(unsigned short *array, long length)
+{
+   unsigned long b1, b2;
+   unsigned char *ptr;
+
+   ptr = (unsigned char *)array;
+   while (length--) {
+      b1 = *ptr++;
+      b2 = *ptr++;
+      *array++ = (unsigned short) ((b1 << 8) | (b2));
+   }
+}
+
+static void ConvertLong(GLuint *array, long length)
+{
+   unsigned long b1, b2, b3, b4;
+   unsigned char *ptr;
+
+   ptr = (unsigned char *)array;
+   while (length--) {
+      b1 = *ptr++;
+      b2 = *ptr++;
+      b3 = *ptr++;
+      b4 = *ptr++;
+      *array++ = (b1 << 24) | (b2 << 16) | (b3 << 8) | (b4);
+   }
+}
+
+static rawImageRec *RawImageOpen(const char *fileName)
+{
+   union {
+      int testWord;
+      char testByte[4];
+   } endianTest;
+   rawImageRec *raw;
+   GLenum swapFlag;
+   int x;
+
+   endianTest.testWord = 1;
+   if (endianTest.testByte[0] == 1) {
+      swapFlag = GL_TRUE;
+   } else {
+      swapFlag = GL_FALSE;
+   }
+
+   raw = (rawImageRec *)malloc(sizeof(rawImageRec));
+   if (raw == NULL) {
+      fprintf(stderr, "Out of memory!\n");
+      return NULL;
+   }
+   if ((raw->file = fopen(fileName, "rb")) == NULL) {
+      perror(fileName);
+      return NULL;
+   }
+
+   fread(raw, 1, 12, raw->file);
+
+   if (swapFlag) {
+      ConvertShort(&raw->imagic, 6);
+   }
+
+   raw->tmp = (unsigned char *)malloc(raw->sizeX*256);
+   raw->tmpR = (unsigned char *)malloc(raw->sizeX*256);
+   raw->tmpG = (unsigned char *)malloc(raw->sizeX*256);
+   raw->tmpB = (unsigned char *)malloc(raw->sizeX*256);
+   if (raw->sizeZ==4) {
+      raw->tmpA = (unsigned char *)malloc(raw->sizeX*256);
+   }
+   if (raw->tmp == NULL || raw->tmpR == NULL || raw->tmpG == NULL ||
+       raw->tmpB == NULL) {
+      fprintf(stderr, "Out of memory!\n");
+      return NULL;
+   }
+
+   if ((raw->type & 0xFF00) == 0x0100) {
+      x = raw->sizeY * raw->sizeZ * sizeof(GLuint);
+      raw->rowStart = (GLuint *)malloc(x);
+      raw->rowSize = (GLint *)malloc(x);
+      if (raw->rowStart == NULL || raw->rowSize == NULL) {
+         fprintf(stderr, "Out of memory!\n");
+         return NULL;
+      }
+      raw->rleEnd = 512 + (2 * x);
+      fseek(raw->file, 512, SEEK_SET);
+      fread(raw->rowStart, 1, x, raw->file);
+      fread(raw->rowSize, 1, x, raw->file);
+      if (swapFlag) {
+         ConvertLong(raw->rowStart, (long) (x/sizeof(GLuint)));
+         ConvertLong((GLuint *)raw->rowSize, (long) (x/sizeof(GLint)));
+      }
+   }
+   return raw;
+}
+
+static void RawImageClose(rawImageRec *raw)
+{
+
+   fclose(raw->file);
+   free(raw->tmp);
+   free(raw->tmpR);
+   free(raw->tmpG);
+   free(raw->tmpB);
+   if (raw->sizeZ>3) {
+      free(raw->tmpA);
+   }
+   free(raw);
+}
+
+static void RawImageGetRow(rawImageRec *raw, unsigned char *buf, int y, int z)
+{
+   unsigned char *iPtr, *oPtr, pixel;
+   int count, done = 0;
+
+   if ((raw->type & 0xFF00) == 0x0100) {
+      fseek(raw->file, (long) raw->rowStart[y+z*raw->sizeY], SEEK_SET);
+      fread(raw->tmp, 1, (unsigned int)raw->rowSize[y+z*raw->sizeY],
+            raw->file);
+      
+      iPtr = raw->tmp;
+      oPtr = buf;
+      while (!done) {
+         pixel = *iPtr++;
+         count = (int)(pixel & 0x7F);
+         if (!count) {
+			 done = 1;
+            return;
+         }
+         if (pixel & 0x80) {
+            while (count--) {
+               *oPtr++ = *iPtr++;
+            }
+         } else {
+            pixel = *iPtr++;
+            while (count--) {
+               *oPtr++ = pixel;
+            }
+         }
+      }
+   } else {
+      fseek(raw->file, 512+(y*raw->sizeX)+(z*raw->sizeX*raw->sizeY),
+            SEEK_SET);
+      fread(buf, 1, raw->sizeX, raw->file);
+   }
+}
+
+
+static void RawImageGetData(rawImageRec *raw, TK_RGBImageRec *final)
+{
+   unsigned char *ptr;
+   int i, j;
+
+   final->data = (unsigned char *)malloc((raw->sizeX+1)*(raw->sizeY+1)*4);
+   if (final->data == NULL) {
+      fprintf(stderr, "Out of memory!\n");
+   }
+
+   ptr = final->data;
+   for (i = 0; i < (int)(raw->sizeY); i++) {
+      RawImageGetRow(raw, raw->tmpR, i, 0);
+      RawImageGetRow(raw, raw->tmpG, i, 1);
+      RawImageGetRow(raw, raw->tmpB, i, 2);
+      if (raw->sizeZ>3) {
+         RawImageGetRow(raw, raw->tmpA, i, 3);
+      }
+      for (j = 0; j < (int)(raw->sizeX); j++) {
+         *ptr++ = *(raw->tmpR + j);
+         *ptr++ = *(raw->tmpG + j);
+         *ptr++ = *(raw->tmpB + j);
+         if (raw->sizeZ>3) {
+            *ptr++ = *(raw->tmpA + j);
+         }
+      }
+   }
+}
+
+
+static TK_RGBImageRec *tkRGBImageLoad(const char *fileName)
+{
+   rawImageRec *raw;
+   TK_RGBImageRec *final;
+
+   raw = RawImageOpen(fileName);
+   if (!raw) {
+      fprintf(stderr, "File not found\n");
+      return NULL;
+   }
+   final = (TK_RGBImageRec *)malloc(sizeof(TK_RGBImageRec));
+   if (final == NULL) {
+      fprintf(stderr, "Out of memory!\n");
+      return NULL;
+   }
+   final->sizeX = raw->sizeX;
+   final->sizeY = raw->sizeY;
+   final->components = raw->sizeZ;
+   RawImageGetData(raw, final);
+   RawImageClose(raw);
+   return final;
+}
+
+
+static void FreeImage( TK_RGBImageRec *image )
+{
+   free(image->data);
+   free(image);
+}
+
+
+/*
+ * Load an SGI .rgb file and generate a set of 2-D mipmaps from it.
+ * Input:  imageFile - name of .rgb to read
+ *         intFormat - internal texture format to use, or number of components
+ * Return:  GL_TRUE if success, GL_FALSE if error.
+ */
+GLboolean LoadRGBMipmaps( const char *imageFile, GLint intFormat )
+{
+   GLint w, h;
+   return LoadRGBMipmaps2( imageFile, GL_TEXTURE_2D, intFormat, &w, &h );
+}
+
+
+
+GLboolean LoadRGBMipmaps2( const char *imageFile, GLenum target,
+                           GLint intFormat, GLint *width, GLint *height )
+{
+   GLint error;
+   GLenum format;
+   TK_RGBImageRec *image;
+
+   image = tkRGBImageLoad( imageFile );
+   if (!image) {
+      return GL_FALSE;
+   }
+
+   if (image->components==3) {
+      format = GL_RGB;
+   }
+   else if (image->components==4) {
+      format = GL_RGBA;
+   }
+   else {
+      /* not implemented */
+      fprintf(stderr,
+              "Error in LoadRGBMipmaps %d-component images not implemented\n",
+              image->components );
+      return GL_FALSE;
+   }
+
+   error = gluBuild2DMipmaps( target,
+                              intFormat,
+                              image->sizeX, image->sizeY,
+                              format,
+                              GL_UNSIGNED_BYTE,
+                              image->data );
+
+   *width = image->sizeX;
+   *height = image->sizeY;
+
+   FreeImage(image);
+
+   return error ? GL_FALSE : GL_TRUE;
+}
+
+
+
+/*
+ * Load an SGI .rgb file and return a pointer to the image data.
+ * Input:  imageFile - name of .rgb to read
+ * Output:  width - width of image
+ *          height - height of image
+ *          format - format of image (GL_RGB or GL_RGBA)
+ * Return:  pointer to image data or NULL if error
+ */
+GLubyte *LoadRGBImage( const char *imageFile, GLint *width, GLint *height,
+                       GLenum *format )
+{
+   TK_RGBImageRec *image;
+   GLint bytes;
+   GLubyte *buffer;
+
+   image = tkRGBImageLoad( imageFile );
+   if (!image) {
+      return NULL;
+   }
+
+   if (image->components==3) {
+      *format = GL_RGB;
+   }
+   else if (image->components==4) {
+      *format = GL_RGBA;
+   }
+   else {
+      /* not implemented */
+      fprintf(stderr,
+              "Error in LoadRGBImage %d-component images not implemented\n",
+              image->components );
+      return NULL;
+   }
+
+   *width = image->sizeX;
+   *height = image->sizeY;
+
+   bytes = image->sizeX * image->sizeY * image->components;
+   buffer = (GLubyte *) malloc(bytes);
+   if (!buffer)
+      return NULL;
+
+   memcpy( (void *) buffer, (void *) image->data, bytes );
+
+   FreeImage(image);
+
+   return buffer;
+}
+
+#define CLAMP( X, MIN, MAX )  ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
+
+
+static void ConvertRGBtoYUV(GLint w, GLint h, GLint texel_bytes,
+			    const GLubyte *src,
+                            GLushort *dest)
+{
+   GLint i, j;
+
+   for (i = 0; i < h; i++) {
+      for (j = 0; j < w; j++) {
+         const GLfloat r = (src[0]) / 255.0;
+         const GLfloat g = (src[1]) / 255.0;
+         const GLfloat b = (src[2]) / 255.0;
+         GLfloat y, cr, cb;
+         GLint iy, icr, icb;
+
+         y  = r * 65.481 + g * 128.553 + b * 24.966 + 16;
+         cb = r * -37.797 + g * -74.203 + b * 112.0 + 128;
+         cr = r * 112.0 + g * -93.786 + b * -18.214 + 128;
+         /*printf("%f %f %f -> %f %f %f\n", r, g, b, y, cb, cr);*/
+         iy  = (GLint) CLAMP(y,  0, 254);
+         icb = (GLint) CLAMP(cb, 0, 254);
+         icr = (GLint) CLAMP(cr, 0, 254);
+
+         if (j & 1) {
+            /* odd */
+            *dest = (iy << 8) | icr;
+         }
+         else {
+            /* even */
+            *dest = (iy << 8) | icb;
+         }
+         dest++;
+	 src += texel_bytes;
+      }
+   }
+}
+
+
+/*
+ * Load an SGI .rgb file and return a pointer to the image data, converted
+ * to 422 yuv.
+ *
+ * Input:  imageFile - name of .rgb to read
+ * Output:  width - width of image
+ *          height - height of image
+ * Return:  pointer to image data or NULL if error
+ */
+GLushort *LoadYUVImage( const char *imageFile, GLint *width, GLint *height )
+{
+   TK_RGBImageRec *image;
+   GLushort *buffer;
+
+   image = tkRGBImageLoad( imageFile );
+   if (!image) {
+      return NULL;
+   }
+
+   if (image->components != 3 && image->components !=4 ) {
+      /* not implemented */
+      fprintf(stderr,
+              "Error in LoadYUVImage %d-component images not implemented\n",
+              image->components );
+      return NULL;
+   }
+
+   *width = image->sizeX;
+   *height = image->sizeY;
+
+   buffer = (GLushort *) malloc( image->sizeX * image->sizeY * 2 );
+
+   if (buffer)
+      ConvertRGBtoYUV( image->sizeX, 
+		       image->sizeY,
+		       image->components,
+		       image->data, 
+		       buffer );
+
+
+   FreeImage(image);
+   return buffer;
+}
+